ICS M4 RIS. Barrel upgrade (Advice needed)

[fabzster]

Originally Posted by Kos-Mos

Remove your upper mechbox (read thread above)
Check on the side of the cylinder, you will see a hole or no hole. You can move the cylinder with your fingers without opening the mechbox, sometimes the hole is placed inside the mechbox to prevent dirt and shit from going in.

If you don't have a hole in there, leave it that way. You don't need to change it for a barrel up to 540mm.

Be careful with the Prometheus rubbers. They work awesome, but sometimes will have some molding scraps at the lips. CAREFULLY cut theses out with a very sharp X-acto. I looked for the reason for jams in a rifle and it was all caused by a hair-thin rubber shaving blocking the BBs.

Madbull barrels are really good. But expect to see a degradation in performance past 50 000 BBs... that might look like a lot, but I know some people that shoot that much in one summer. If you don't intend to keep the rifle for long, or if you are an occasional player, they are very good. The bore is 6.01 vs 6.03 for Prometheus. In an AEGm this won't make a difference in accuracy or range, but might cause jams with cheap BBs (read here KJW or KSC)


ICS guns all use some standard cylinders. The one you saw might have been a bore-up version. Theses are for barrel lenght from 540 to 650mm (PSG-1 barrels). They will also requite a bore-up nozzle, cylinder head and piston head.

If your cylinder is ported, you can just buy any brand of NB (Normal bore) full cylinder. Modify makes awesome parts and can be bought right off airsoftparts.ca.

K awesome, thanks soo much for the helpfull reply..

I just opened my M16 and it seems to have a sleeve that is not ported, see attached pic...... so no need to upgrade that right?

with regards to the barrel should i go:
promethues 6.03 509mm even if my standard barrel is 515mm?
cause if i go for the 6.03 550mm i will then need to the upboar kit right?

So I should just basically upgrade the barrel 509mm and the promethues rubber and i should be good to go for now?

[Kos-Mos]

Yes, that is what I would do.

[HavokZA]

Ok so I couldn't really find the Prometheus 6.03 455mm, they are also double the price, so I went with the Vanaras against better judgment.

I was pleasantly surprised!

Here is the "spreadsheet"



As you can see quite a gain in FPS and it was only a longer barrel and the silencer added. I could test with both stock ICS 363mm, Vanaras 363mm and Vanaras 455mm which I ended up taking.
The accuracy increased a lot and I'm shooting pretty consistent. Distance is also quite a bit further.

The Vanaras precision barrel is a nickel plated Brass barrel. It looks really smooth inside and it's heavy. So I think it's not too bad.

Pick of the gun.



I kept the Cylinder the same even though it is only rated at 430mm barrel length. I will do a upgrade to the 4/5 one later.
For the price I paid I couldn't have asked for more.

[fabzster]

Nice 1

I have ordered the Madbull ver2 6.03mm 509mm for my M16, prommy (soft) rubber and the element H-nub

so we will see what difference it makes